Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
In-Reply-To: <414b44ec-6500-c3e5-f8ca-ce1d21a3eb58@redhat.com>
References: <1506449281-8790-1-git-send-email-pintu.ping@gmail.com>
 <1507049339-16963-1-git-send-email-pintu.ping@gmail.com> <414b44ec-6500-c3e5-f8ca-ce1d21a3eb58@redhat.com>
From:   Pintu Kumar <pintu.ping@gmail.com>
Date:   Fri, 6 Oct 2017 19:58:44 +0530
Message-ID: <CAOuPNLj+m5HAVgs6OWVEuhNFBJv=WbYNdJ1u0SsdHa52ejFrCg@mail.gmail.com>
Subject: Re: [PATCHv2 1/1] [tools]: android/ion: userspace test utility for
 ion buffer sharing
To:     Laura Abbott <labbott@redhat.com>
Cc:     linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Pintu Kumar <pintu_agarwal@yahoo.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

>> +
>> +     heap_type = ion_info->heap_type;
>> +     heap_size = ion_info->heap_size;
>> +     flag_type = ion_info->flag_type;
>> +     alloc_data.len = heap_size;
>> +     alloc_data.heap_id_mask = heap_type;
>
> The heap type and heap ID are not the same thing. You need
> to determine the heap id from using the new query ioctl.
>

Hello Laura,
Can you point out some example on how to retrieve heap_id from query ioctl.
Sorry, I am not able to figure out, how can I get a specific heap_id
if I know the heap_type.
Do, I need to query all the heaps? Then how do I map to heap_data for each heap?
Here is what I am doing.

struct ion_heap_query query;
struct ion_heap_data heap_data[5];

        query.cnt = 5;
        /* Query ION heap_id_mask from ION heap */
        ret = ioctl(ionfd, ION_IOC_HEAP_QUERY, &query);
        if (ret < 0) {
                fprintf(stderr, "<%s>: Failed: ION_IOC_HEAP_QUERY: %s\n",
                        __func__, strerror(errno));
                goto err_heap;
        }

After this how to map each heap_data[..]  to query.heaps?
Do you have any examples?

From 1580366438182195601@xxx Wed Oct 04 22:08:02 +0000 2017
X-GM-THRID: 1579656416160844925
X-Gmail-Labels: Inbox,Category Forums